It's the damaged light on the left shoulder, isn't it?

Looks like a custom Warhammer.

Looks like a custom Hunter although that wasn't the artist's intent.

Best reseen autocannon placement.

I can't tell if this is a model or CG.

Link is dead.

The only one I am not sure about is the Blackjack looking weird thing in the upper right.

Link in description is busted.

A Concussion 100 ton assault mech and Sagittaire 95 tonner are joined by LRM carriers and a Marksman M1 tank, forming a fire support group defending their base perimeter.
Concussion weapons load out:
2 Extended Range Large Lasers
2 Gauss Rifles
2 Long Range Missile 10s

There is a chart of the trinity showing which one is which on the booru.

It's night time above, but the countryside is kind of lit up. IDK, man, I only tag here.

Crusader-like? I don't know much about the old Battledroids days.

That is the weirdest looking Anubis I have ever seen.

That is one short Blood Reaper comparing it to the light mechs.

Jenner = 35 tons. Catapult = 65 tons.
Great size scaling. (sic)